100m for Grealish is wild.
I don't see how he makes them any better than they currently are. Legit adds nothing they don't have already.
Left footed left side dominant player.
The left footed attackers in the first team are Mahrez, Foden, Bernardo Silva. Mahrez and Bernardo only operate on the right, Foden has played all over and doesn't have a dedicated favored side as yet. Grealish creates many chances on that left side, something lacking since Silva and Sane left.
Is it a need? No, but it's another weapon that should help when you play against a low block 95% of the time. The price is the price, people will talk about it regardless. Talented English players don't come cheap.